Caterpillar P120
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar P120 is a mechanical pulverizer work tool, a fixed-jaw excavator attachment built for primary and secondary concrete demolition and rebar separation. It sits in the middle of Caterpillar's legacy P115-P120-P130-P140 pulverizer family, sized between the smaller P115 and the larger P130 and P140, and pairs with excavators in roughly the 20-30 tonne class through a carrier-specific bracket-and-link mounting kit. The jaw itself carries no engine or onboard power source of any kind; it is driven entirely by the host excavator's auxiliary hydraulic circuit through a single jaw cylinder. Production for the P120 and its P115-P140 siblings is tracked under the shared Caterpillar serial prefix AEK, documented in one combined parts and service manual covering all four sizes.
Caterpillar's current pulverizer lineup has moved to hydraulically rotating jaws, split into Secondary-duty (P218/P224/P232/P245) and Primary-duty (P318/P324/P332/P345) families that add powered 360-degree rotation for repositioning the jaw without repositioning the carrier. The P120's fixed, non-rotating jaw is mechanically simpler by comparison, with fewer hydraulic circuits and rotation-drive components to maintain or fail. That simplicity is exactly why legacy fixed-jaw units like the P120 remain active in the used-equipment and parts market: owners running older carriers or budget-conscious demolition fleets can still source pins, bushings, and jaw wear components against the AEK-prefix parts catalog, even though Caterpillar's current spec-sheet library and marketing attention have shifted entirely to the newer P2xx/P3xx rotating line.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar P120 specifications
Carrier fit
| Carrier class | Roughly 20-30 tonne excavators; parts-catalog fitment notes for this AEK-prefix family reference 324D/325D/330D-class carriers. |
| Position within family | P120 sits between P115 (smallest) and P130/P140 (largest) in the P115/P120/P130/P140 mechanical-pulverizer line. Larger family members pair with correspondingly larger carriers and smaller members with smaller carriers, but a P120-specific carrier split versus its siblings could not be confirmed from an independent P120-only spec sheet - treat the carrier class above as the P120's approximate placement, not an exact cutoff. |
Weight
| Operating/shipping weight | No independently verifiable P120-specific weight figure located. Secondary listings that surface this tool return figures that don't reconcile internally (mismatched mass/force unit pairings from one mention to the next), so no number is reported here - confirm the exact P120 figure against the AEK-prefix parts/service literature or with your dealer. |
Jaw / working dimensions
| Jaw opening / closing force | No independently verifiable P120-specific jaw-opening or closing-force figure located. As with weight, the only figures surfacing in searches conflict with each other and don't hold up on unit cross-check, so none are reported - confirm the exact P120 figures with your dealer or the AEK-prefix service documentation before quoting a number. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
P120 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase | not applicable — no onboard engine | not applicable |
| Cooling system | not applicable — no onboard engine | not applicable |
| Fuel tank | not applicable — no onboard engine | not applicable |
| Hydraulic system | no separate reservoir — jaw cylinder runs on the carrier excavator's auxiliary hydraulic circuit | use the fluid grade specified for the host excavator's hydraulic system (Cat HYDO Advanced or equivalent, per carrier OMM) |
| Grease points (jaw pivot, pins, bushings) | manual grease-gun application, no filled-system capacity published | Cat Multipurpose Grease or Cat Advanced 3Moly Grease, NLGI grade 2 |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar P120 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
Servicing the P120 beyond the schedule
Predictive Maintenance & Wear Inspection
Track jaw and tooth plate wear against service limits at each interval rather than waiting for visible failure. Watch pin-and-bushing play as the leading indicator of joint wear, since a mechanical pulverizer's accuracy and closing force degrade well before a pin fully fails. Log grease consumption at each fitting; a fitting that suddenly takes more grease than normal often signals bushing wear letting grease escape. Catching these trends early keeps unplanned downtime off a demolition schedule.
Corrective & Common Repairs
Most P120 repairs center on the same wear points across the P115-P140 family: worn jaw teeth losing bite on rebar and concrete, elongated pin bores from cyclic loading, and bracket or link fatigue cracking near mounting eyes. Replace teeth and pins before wear reaches the point of stressing the surrounding casting. Inspect bracket welds after any reported impact or overload event, since a cracked bracket under demolition loads can propagate quickly if left in service.
Overhaul & Rebuild Points
A full rebuild on this attachment centers on pin and bushing replacement, jaw realignment, and cylinder reseal rather than any powertrain work, since the tool has none. Press out worn bushings and verify housing bores are still round before installing new ones. Realign the jaw assembly to restore even tooth mesh across the full closing stroke. Confirm the cylinder's mounting trunnions and rod eye are free of wear before returning the tool to service.
Demolition-Site & Environment Servicing
Concrete dust and rebar debris pack quickly into pivot joints and grease fittings on an active demolition site, so clear fittings before each greasing rather than pumping grease against a blocked passage. Protect the carrier's auxiliary hydraulic hoses from abrasion and pinch points where the attachment articulates near structural debris. Rinse accumulated dust and fines from the jaw pivot area regularly, since packed concrete dust accelerates pin and bushing wear far faster than normal dirt exposure.
P120 attachments & work tools
Work tool identity
The P120 is itself a work tool, not a carrier machine: a mechanical concrete pulverizer designed to mount on a medium hydraulic excavator boom/stick. It belongs to a four-model mechanical pulverizer line alongside the P115, P130, and P140, sized progressively for larger carriers.
Carrier/size class fit
P120 is matched to excavators in roughly the 20-30 tonne class (D-series machines such as the 324D/325D/330D range); the sibling P115 fits smaller 20D-class carriers, while P130 and P140 step up toward 330D/345C and 365C L class carriers. Exact carrier fitment varies by boom/stick linkage and dealer configuration.
Jaw sizing across the family
Jaw opening and attachment weight scale with model number across the P115-P140 range, from roughly 800 mm opening/850 kg at the small end to roughly 1400 mm opening/1500 kg at the top of the family. Published figures vary by source on whether a given number describes weight or closing force, so treat exact figures as approximate and confirm against the dealer spec sheet for the specific carrier pairing.
Mounting/coupler system
The pulverizer pin-mounts directly to the excavator stick and boom link through a bracket-and-link group matched to that carrier's specific linkage geometry, not a single universal coupler. Because linkage geometry differs by carrier model, a distinct mounting-bracket kit exists for nearly every compatible excavator/linkage combination rather than one common bracket.
Hydraulic kit/arrangement
The jaw cylinder runs off the carrier's auxiliary attachment hydraulic circuit, so the excavator needs an auxiliary hydraulics kit and control valve to open and close the jaw. This mechanical pulverizer line is a fixed, non-rotating jaw arrangement; continuous hydraulic rotation is a feature of Cat's newer, separate pulverizer product line rather than this family.
Guarding/operator protection
Demolition duty with a pulverizer is typically paired with cab guarding on the host excavator, such as polycarbonate window guards and top/front debris screens, to protect the operator from flying concrete and rebar fragments. This is a carrier-level protection package rather than a feature of the pulverizer itself.
Later/adjacent Cat pulverizer lines (do not conflate)
Cat's current catalog organizes pulverizers into separate Primary (rotating jaw, larger carrier span) and Secondary (fixed jaw, rebar/concrete separation) product lines for roughly 20-55 ton carriers. These are a distinct, newer generation of pulverizer attachment from the P115-P140 mechanical pulverizer family the P120 belongs to, and specs should not be borrowed across the two lines without a documented link.
All P120 assemblies by section
Every catalogued assembly group for the Caterpillar P120. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
293-3438 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 29***38 | Mounting Group-Pulverizer | 1 |
| 29***39 | Bracket Group-Mounting | 1 |
169-3063 Mounting Gp-Pulverizer
| 16***63 | Mounting Group-Pulverizer | 1 |
| 16***68 | Bracket Group-Mounting | 1 |
| 16***69 | Link Group | 1 |
185-1381 Mounting Gp-Pulverizer
| 16***24 | Bracket Group-Mounting | 1 |
| 16***26 | Bracket Group-Mounting | 1 |
| 18***81 | Mounting Group-Pulverizer | 1 |
184-9819 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***24 | Bracket Group-Mounting | 1 |
| 18***19 | Mounting Group-Pulverizer | 1 |
185-7828 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 17***83 | Bracket Group-Mounting | 1 |
| 18***28 | Mounting Group-Pulverizer | 1 |
301-4312 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 30***12 | Mounting Group-Pulverizer | 1 |
| 30***70 | Cyl.; Boom (L), Bracket Group-Mounting, Cylinder; Boom(L), Cyl.; Boom (Left) | 1 |
171-1472 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 17***96 | Link Group | 1 |
| 17***72 | Mounting Group-Pulverizer | 1 |
295-4927 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 29***27 | Mounting Group-Pulverizer | 1 |
| 29***29 | Bracket Group-Mounting | 1 |
301-4310 Mounting Gp-Pulverizer
| 16***71 | Bracket Group-Mounting | 1 |
| 30***10 | Mounting Group-Pulverizer | 1 |
| 30***66 | Link Group | 1 |
171-2264 Mounting Gp-Pulverizer
| 16***71 | Bracket Group-Mounting | 1 |
| 17***64 | Mounting Group-Pulverizer | 1 |
| 17***65 | Bracket Group-Mounting | 1 |
169-3150 Mounting Gp-Pulverizer
| 16***50 | Mounting Group-Pulverizer | 1 |
| 16***52 | Bracket Group-Mounting | 1 |
| 16***53 | Link Group | 1 |
184-3501 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***92 | Bracket Group-Mounting | 1 |
| 18***00 | Link Group | 1 |
171-1471 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 17***78 | Link Group | 1 |
| 17***71 | Mounting Group-Pulverizer | 1 |
184-9850 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 18***50 | Mounting Group-Pulverizer | 1 |
| 18***52 | Bracket Group-Mounting | 1 |
224-2481 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 18***17 | Link Group | 1 |
| 22***81 | Mounting Group-Pulverizer | 1 |
170-9030 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***97 | Link Group | 1 |
| 17***30 | Mounting Group-Pulverizer | 1 |
290-4009 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 29***09 | Mounting Group-Pulverizer | 1 |
| 29***10 | Bracket Group-Mounting | 1 |
171-0723 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***99 | Link Group | 1 |
| 17***23 | Mounting Group-Pulverizer | 1 |
171-3082 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 17***82 | Mounting Group-Pulverizer | 1 |
| 17***83 | Bracket Group-Mounting | 1 |
295-2670 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 29***70 | Mounting Group-Pulverizer | 1 |
| 29***71 | Bracket Group-Mounting | 1 |
169-4623 Mounting Gp-Pulverizer
| 16***23 | Mounting Group-Pulverizer | 1 |
| 16***24 | Bracket Group-Mounting | 1 |
| 16***25 | Link Group | 1 |
301-4308 Mounting Gp-Pulverizer
| 16***54 | Bracket Group-Mounting | 1 |
| 29***29 | Bracket Group-Mounting | 1 |
| 30***08 | Mounting Group-Pulverizer | 1 |
291-9849 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***98 | Link Group | 1 |
| 29***49 | Mounting Group-Pulverizer | 1 |
170-8291 Mounting Gp-Pulverizer
| 16***38 | Bracket Group-Mounting | 1 |
| 17***91 | Mounting Group-Pulverizer | 1 |
| 17***92 | Bracket Group-Mounting | 1 |
169-3435 Mounting Gp-Pulverizer
| 16***35 | Mounting Group-Pulverizer | 1 |
| 16***36 | Bracket Group-Mounting | 1 |
| 16***37 | Link Group | 1 |
184-9851 Mounting Gp-Pulverizer
| 16***26 | Bracket Group-Mounting | 1 |
| 18***51 | Mounting Group-Pulverizer | 1 |
| 18***53 | Bracket Group-Mounting | 1 |
Service Equipment And Supplies
169-3064 Plate & Film Gp
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
| 14***70 | Film-Warning; (Read Omm) | 2 |
169-3067 Plate & Film Gp
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
| 14***70 | Film-Warning; (Read Omm) | 2 |
169-3066 Plate & Film Gp
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
| 14***70 | Film-Warning; (Read Omm) | 2 |
169-3070 Plate & Film Gp
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
| 14***70 | Film-Warning; (Read Omm) | 2 |
Work Tool Arrangement
295-6071 Pulverizer Ar-Mechanical
| 17***81 | Pulverizer Group | 1 |
| 29***70 | Mounting Group-Pulverizer | 1 |
| 29***71 | Pulverizer Ar-Mechanical | 1 |
171-0722 Pulverizer Ar-Mechanical
| 17***22 | Pulverizer Ar-Mechanical | 1 |
| 17***23 | Mounting Group-Pulverizer | 1 |
| 17***85 | Pulverizer Group | 1 |
184-9849 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 18***49 | Pulverizer Ar-Mechanical | 1 |
| 18***51 | Mounting Group-Pulverizer | 1 |
171-1459 Pulverizer Ar-Mechanical
| 17***59 | Pulverizer Ar-Mechanical | 1 |
| 17***64 | Mounting Group-Pulverizer | 1 |
| 17***76 | Pulverizer Group | 1 |
301-4307 Pulverizer Ar-Mechanical
| 17***81 | Pulverizer Group | 1 |
| 30***07 | Pulverizer Ar-Mechanical | 1 |
| 30***08 | Mounting Group-Pulverizer | 1 |
293-3437 Pulverizer Ar-Mechanical
| 17***85 | Pulverizer Group | 1 |
| 29***37 | Pulverizer Ar-Mechanical | 1 |
| 29***38 | Mounting Group-Pulverizer | 1 |
169-3151 Pulverizer Ar-Mechanical
| 16***51 | Pulverizer Ar-Mechanical | 1 |
| 16***35 | Mounting Group-Pulverizer | 1 |
| 17***85 | Pulverizer Group | 1 |
169-3062 Pulverizer Ar-Mechanical
| 16***62 | Pulverizer Ar-Mechanical | 1 |
| 16***63 | Mounting Group-Pulverizer | 1 |
| 17***76 | Pulverizer Group | 1 |
171-1460 Pulverizer Ar-Mechanical
| 17***60 | Pulverizer Ar-Mechanical | 1 |
| 17***82 | Mounting Group-Pulverizer | 1 |
| 17***90 | Pulverizer Group | 1 |
184-9818 Pulverizer Ar-Mechanical
| 17***85 | Pulverizer Group | 1 |
| 18***18 | Pulverizer Ar-Mechanical | 1 |
| 18***19 | Mounting Group-Pulverizer | 1 |
169-3165 Pulverizer Ar-Mechanical
| 16***65 | Pulverizer Ar-Mechanical | 1 |
| 16***23 | Mounting Group-Pulverizer | 1 |
| 17***90 | Pulverizer Group | 1 |
290-4008 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 29***08 | Pulverizer Ar-Mechanical | 1 |
| 29***09 | Mounting Group-Pulverizer | 1 |
185-1372 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 18***72 | Pulverizer Ar-Mechanical | 1 |
| 18***81 | Mounting Group-Pulverizer | 1 |
185-7827 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 18***27 | Pulverizer Ar-Mechanical | 1 |
| 18***28 | Mounting Group-Pulverizer | 1 |
184-9848 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 18***48 | Pulverizer Ar-Mechanical | 1 |
| 18***50 | Mounting Group-Pulverizer | 1 |
224-2480 Pulverizer Ar-Mechanical
| 17***90 | Pulverizer Group | 1 |
| 22***80 | Pulverizer Ar-Mechanical | 1 |
| 22***81 | Mounting Group-Pulverizer | 1 |
170-9028 Pulverizer Ar-Mechanical
| 17***28 | Pulverizer Ar-Mechanical | 1 |
| 17***30 | Mounting Group-Pulverizer | 1 |
| 17***85 | Pulverizer Group | 1 |
301-4309 Pulverizer Ar-Mechanical
| 17***76 | Pulverizer Group | 1 |
| 30***09 | Pulverizer Ar-Mechanical | 1 |
| 30***10 | Mounting Group-Pulverizer | 1 |
301-4311 Pulverizer Ar-Mechanical
| 17***76 | Pulverizer Group | 1 |
| 30***11 | Pulverizer Ar-Mechanical | 1 |
| 30***12 | Mounting Group-Pulverizer | 1 |
184-3502 Pulverizer Ar-Mechanical
| 17***85 | Pulverizer Group | 1 |
| 18***01 | Mounting Group-Pulverizer | 1 |
| 18***02 | Pulverizer Ar-Mechanical | 1 |
171-1455 Pulverizer Ar-Mechanical
| 17***55 | Pulverizer Ar-Mechanical | 1 |
| 17***71 | Mounting Group-Pulverizer | 1 |
| 17***81 | Pulverizer Group | 1 |
295-6072 Pulverizer Ar-Mechanical
| 17***81 | Pulverizer Group | 1 |
| 29***27 | Mounting Group-Pulverizer | 1 |
| 29***72 | Pulverizer Ar-Mechanical | 1 |
170-8276 Pulverizer Ar-Mechanical
| 17***76 | Pulverizer Ar-Mechanical | 1 |
| 17***91 | Mounting Group-Pulverizer | 1 |
| 17***85 | Pulverizer Group | 1 |
291-9848 Pulverizer Ar-Mechanical
| 17***85 | Pulverizer Group | 1 |
| 29***48 | Pulverizer Ar-Mechanical | 1 |
| 29***49 | Mounting Group-Pulverizer | 1 |
169-3148 Pulverizer Ar-Mechanical
| 16***48 | Pulverizer Ar-Mechanical | 1 |
| 16***50 | Mounting Group-Pulverizer | 1 |
| 17***81 | Pulverizer Group | 1 |
171-1454 Pulverizer Ar-Mechanical
| 17***54 | Pulverizer Ar-Mechanical | 1 |
| 17***72 | Mounting Group-Pulverizer | 1 |
| 17***81 | Pulverizer Group | 1 |
Work Tools
175-3014 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 17***14 | Bracket Group-Mounting | 1 |
| 17***51 | Bracket Group-Mounting | 1 |
184-9852 Bracket Gp-Mounting
| 16***28 | Pin; (307mm) | 4 |
| 18***52 | Bracket Group-Mounting | 1 |
| 18***55 | Bracket As | 1 |
171-0724 Bracket Gp-Mounting
| 16***41 | Pin; (253mm) | 4 |
| 17***24 | Bracket Group-Mounting | 1 |
| 17***25 | Bracket As | 1 |
170-9031 Bracket Gp-Mounting
| 16***41 | Pin; (253mm) | 4 |
| 17***31 | Bracket Group-Mounting | 1 |
| 17***38 | Bracket As | 1 |
291-9850 Bracket Gp-Mounting
| 16***41 | Pin; (253mm) | 4 |
| 20***71 | Washer; (26x90x8-mm Thk) | 1 |
| 29***50 | Bracket Group-Mounting | 1 |
295-4929 Bracket Gp-Mounting
| 09***49 | Washer; (22x60x6-mm Thk) | 1 |
| 16***56 | Pin; (251 mm) | 4 |
| 29***29 | Bracket Group-Mounting | 1 |
169-4626 Bracket Gp-Mounting
| 09***48 | Nipple, Grease | 2 |
| 16***26 | Bracket Group-Mounting | 1 |
| 16***43 | Bracket As | 1 |
169-3068 Bracket Gp-Mounting
| 16***68 | Bracket Group-Mounting | 1 |
| 16***72 | Bracket As | 1 |
| 16***73 | Pin; (124mm) | 4 |
290-4010 Bracket Gp-Mounting
| 16***28 | Pin; (307mm) | 4 |
| 29***10 | Bracket Group-Mounting | 1 |
| 29***11 | Bracket As | 1 |
169-4624 Bracket Gp-Mounting
| 16***24 | Bracket Group-Mounting | 1 |
| 16***27 | Bracket As | 1 |
| 16***28 | Pin; (307mm) | 4 |
224-2482 Bracket Gp-Mounting
| 16***28 | Pin; (307mm) | 4 |
| 22***82 | Bracket Group-Mounting | 1 |
| 7X***68 | Bolt; (M20x2.5x180-mm) | 4 |
302-6270 Bracket Gp-Mounting
| 16***73 | Pin; (124mm) | 4 |
| 30***70 | Cyl.; Boom (L), Bracket Group-Mounting, Cylinder; Boom(L), Cyl.; Boom (Left) | 1 |
| 30***71 | Cyl.; Boom (R), Cylinder; Boom (R), Bracket As, Cyl.; Boom (Right) | 1 |
171-2265 Bracket Gp-Mounting
| 16***73 | Pin; (124mm) | 4 |
| 17***65 | Bracket Group-Mounting | 1 |
| 17***67 | Bracket As | 1 |
179-1651 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***33 | Cover | 1 |
| 17***18 | Bracket As | 1 |
169-3071 Bracket Gp-Mounting
| 09***48 | Nipple, Grease | 1 |
| 16***71 | Bracket Group-Mounting | 1 |
| 16***91 | Bracket As | 1 |
293-3439 Bracket Gp-Mounting
| 16***41 | Pin; (253mm) | 4 |
| 29***39 | Bracket Group-Mounting | 1 |
| 29***40 | Bracket As | 1 |
171-1473 Bracket Gp-Mounting
| 16***56 | Pin; (251 mm) | 4 |
| 17***73 | Bracket Group-Mounting | 1 |
| 17***75 | Bracket As | 1 |
169-3152 Bracket Gp-Mounting
| 16***52 | Bracket Group-Mounting | 1 |
| 16***55 | Bracket As | 1 |
| 16***56 | Pin; (251 mm) | 4 |
170-8292 Bracket Gp-Mounting
| 16***41 | Pin; (253mm) | 4 |
| 17***92 | Bracket Group-Mounting | 1 |
| 17***93 | Bracket As | 1 |
169-3436 Bracket Gp-Mounting
| 16***36 | Bracket Group-Mounting | 1 |
| 16***40 | Bracket As | 1 |
| 16***41 | Pin; (253mm) | 4 |
169-3438 Bracket Gp-Mounting
| 09***48 | Nipple, Grease | 2 |
| 16***38 | Bracket Group-Mounting | 1 |
| 16***56 | Bracket As | 1 |
171-1474 Bracket Gp-Mounting
| 16***56 | Pin; (251 mm) | 4 |
| 17***74 | Bracket Group-Mounting | 1 |
| 17***76 | Bracket As | 1 |
169-3154 Bracket Gp-Mounting
| 09***48 | Nipple, Grease | 1 |
| 16***92 | Pin | 1 |
| 16***54 | Bracket Group-Mounting | 1 |
184-9853 Bracket Gp-Mounting
| 16***28 | Pin; (307mm) | 4 |
| 18***53 | Bracket Group-Mounting | 1 |
| 18***56 | Bracket As | 1 |
295-2671 Bracket Gp-Mounting
| 16***56 | Pin; (251 mm) | 4 |
| 20***71 | Washer; (26x90x8-mm Thk) | 1 |
| 29***71 | Bracket Group-Mounting | 1 |
171-3083 Bracket Gp-Mounting
| 16***28 | Pin; (307mm) | 4 |
| 17***83 | Bracket Group-Mounting | 1 |
| 17***18 | Bracket As | 1 |
184-9820 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 14***47 | Bearing-Sleeve | 2 |
| 16***87 | Bushing | 2 |
290-4014 Link Gp
| 08***48 | Bearing-Sleeve; (120mm Lg) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
170-8296 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***58 | Bushing; (50mm) | 2 |
295-4933 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***58 | Bushing; (50mm) | 2 |
| 29***33 | Link Group | 1 |
170-8278 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***58 | Bushing; (50mm) | 2 |
171-3084 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
| 17***84 | Link Group | 1 |
169-4625 Link Gp
| 08***79 | Bearing; (Sleeve) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***25 | Link Group | 1 |
302-6266 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***03 | Bushing | 2 |
303-4628 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***03 | Bushing | 2 |
| 30***28 | Link Group | 1 |
169-3437 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***87 | Bushing | 2 |
| 16***37 | Link Group | 1 |
169-3153 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***53 | Link Group | 1 |
| 16***57 | Link As | 1 |
295-6178 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***87 | Bushing | 2 |
| 29***78 | Link Group | 1 |
302-4372 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***58 | Bushing; (50mm) | 2 |
170-8299 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 14***47 | Bearing-Sleeve | 2 |
| 16***87 | Bushing | 2 |
171-2266 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***03 | Bushing | 2 |
184-3500 Link Gp
| 08***79 | Bearing; (Sleeve) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***87 | Bushing | 2 |
170-8297 Link Gp
| 08***48 | Bearing-Sleeve; (120mm Lg) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***87 | Bushing | 2 |
169-3069 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 09***54 | Seal; (Id=79.85mm) | 4 |
| 16***69 | Link Group | 1 |
170-8298 Link Gp
| 08***48 | Bearing-Sleeve; (120mm Lg) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***87 | Bushing | 2 |
295-2675 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***58 | Bushing; (50mm) | 2 |
| 29***75 | Link Group | 1 |
184-9858 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
| 18***58 | Link Group | 1 |
184-9857 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
| 18***57 | Link Group | 1 |
185-3810 Link Gp
| 08***48 | Bearing-Sleeve; (120mm Lg) | 2 |
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
188-9717 Link Gp
| 09***48 | Nipple, Grease | 3 |
| 16***59 | Bushing | 4 |
| 18***17 | Link Group | 1 |
169-3434 Pulverizer Gp
| 09***48 | Nipple, Grease | 2 |
| 14***78 | Lockwasher | 4 |
| 16***88 | Plate-Lock; (170 mm) | 2 |
177-3776 Pulverizer Gp
| 16***57 | Pulverizer Group | 1 |
| 16***64 | Plate & Film Group | 1 |
| 17***76 | Pulverizer Group | 1 |
169-3149 Pulverizer Gp
| 09***48 | Nipple, Grease | 2 |
| 14***78 | Lockwasher | 4 |
| 16***79 | Tooth Group-Crusher | 1 |
177-3781 Pulverizer Gp
| 16***66 | Plate & Film Group | 1 |
| 16***49 | Pulverizer Group | 1 |
| 17***81 | Pulverizer Group | 1 |
177-3785 Pulverizer Gp
| 16***67 | Plate & Film Group | 1 |
| 16***34 | Pulverizer Group | 1 |
| 17***85 | Pulverizer Group | 1 |
168-6857 Pulverizer Gp
| 09***48 | Nipple, Grease | 2 |
| 14***78 | Lockwasher | 4 |
| 16***57 | Pulverizer Group | 1 |
177-3790 Pulverizer Gp
| 16***70 | Plate & Film Group | 1 |
| 16***22 | Pulverizer Group | 1 |
| 17***90 | Pulverizer Group | 1 |
169-4622 Pulverizer Gp
| 09***48 | Nipple, Grease | 2 |
| 14***78 | Lockwasher | 4 |
| 16***88 | Plate-Lock; (170 mm) | 2 |
169-4634 Tooth Gp-Crusher
| 16***77 | Lockwasher | 14 |
| 16***34 | Tooth Group-Crusher | 1 |
| 16***42 | Tooth | 14 |
169-3079 Tooth Gp-Crusher
| 15***22 | Lockwasher | 14 |
| 16***79 | Tooth Group-Crusher | 1 |
| 16***90 | Tooth | 10 |
169-3448 Tooth Gp-Crusher
| 15***22 | Lockwasher | 15 |
| 16***48 | Tooth Group-Crusher | 1 |
| 28***00 | Tooth | 15 |
P120 serial number reference
The PIN plate on a P120 pulverizer is riveted to the tool's mounting bracket or top frame plate, near the pivot end where it bolts to the excavator stick. Read the first three characters as the serial prefix (letters that tie the unit to its parts/service manual family and size range), and the digits that follow as the build sequence number within that prefix.
| Prefix | Identifies | Notes |
|---|---|---|
| AEK | P115 / P120 / P130 / P140 Mechanical Pulverizer family | Shared parts-manual serial prefix covering all four frame sizes of the mechanical (fixed-jaw) pulverizer line, range starts at AEK00001-UP. No separate or later prefix documented for the P120 specifically; treat AEK as covering the full production run unless a dealer confirms otherwise. |
Frequently asked questions
What size excavator does the Cat P120 pulverizer fit?
The P120 mounts to excavators in roughly the 20-30 tonne class through a carrier-specific bracket-and-link kit, sized between the smaller P115 and larger P130 within the shared P115-P140 mechanical pulverizer family.
What powers the P120's jaw?
The P120 has no engine or onboard power source. Its jaw cylinder runs entirely off the host excavator's auxiliary hydraulic circuit, so jaw force and cycle speed depend on the carrier's own hydraulic output.
Has the P120 been replaced in Caterpillar's current lineup?
Caterpillar's current pulverizer offering has shifted to hydraulically rotating jaw designs across the P218-P245 Secondary and P318-P345 Primary lines. The P120 and its fixed-jaw P115-P140 siblings are legacy attachments no longer part of Caterpillar's active spec-sheet lineup, though parts support continues under the AEK-prefix catalog.
What P120 owners discuss
What wear pattern do owners typically see on P120-family jaw teeth in demolition work?
What are the main pin and bushing maintenance points on this pulverizer family?
How does a fixed-jaw mechanical pulverizer like the P120 compare to Cat's newer hydraulic rotating pulverizers?
What hydraulic or auxiliary circuit considerations matter when running this pulverizer?
What safety concerns come up most with this type of attachment?
What should a buyer check when shopping for a used P120 or a P115/P130/P140 family sibling?
Is there much discussion specific to the P120 model by itself?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific P120 part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.